The presence of spellware is normally obvous to magical detection - even if the function is not. This spellware masks the other spellware you are using, making t very hard to detect. Standard magic scans always fail - only a sustained effort over one hour or more can succeed.
Spellwareis only concealed if it is not actively used. Activating the magical effect of any piece of spellware breaks the mask - though the spellware itself is not revealed, only the effect.